The invention discloses a preparation method of a
residual oil hydrogenation monolithic catalyst. The preparation method comprises the following steps of: (1) mixing and tabletting mixed
powder with different usage amounts with dilute
nitric acid and ultrafine
fiber to prepare a monolithic catalyst carrier with a three-dimensional penetrating pore passage; (2) immersing the monolithic catalyst carrier in a tween-80 solution at certain concentration, airing,
drying, calcining, immersing the treated monolithic catalyst carrier in a
molybdenum-
nickel-
phosphorus solution with different metered
molybdenum-
nickel proportions, and airing,
drying and calcining to prepare the
residual oil hydrogenation monolithic catalyst. The preparation method disclosed by the invention can be used for synthesizing the catalyst in the presence of a structureless carrier, is favorable to the penetration of a gum asphaltic
micelle contained in
residual oil by introducing the micron-sized pore passage through the addition of the
fiber, can be used for reducing the
diffusion resistance to inhibit coking, solving the problem of catalyst deactivation caused by reaction coking, shortening the shutdown period and reducing the industrial cost, is large in loaded active
metal quantity and relatively high in hydrogenation activity, and is
pollution-free on the environment, green and environmental-friendly by introducing no other impurities.